Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Wendover, UT

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
435-240 A   939H COMMIO, LLC 660      
435-240 0   145J TERRA NOVA TELECOM INC. 660   2025-07-10   
435-240 1 SLKCUT267MD  939H COMMIO, LLC 660   2021-11-28   
435-240 8 SLKCUT267MD  939H COMMIO, LLC 660   2021-11-28   
435-665 A WNDVUTMADS1  2283 SKYLINE TELECOM 660      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.